tu su ti tu su ti
tu su ti tu su ti .
t̪̻ u WORD_BOUNDARY s̪̻ u WORD_BOUNDARY t̪̻ i WORD_BOUNDARY t̪̻ u WORD_BOUNDARY s̪̻ u WORD_BOUNDARY t̪̻ i WORD_BOUNDARY
t u WORD_BOUNDARY s u WORD_BOUNDARY t i WORD_BOUNDARY t u WORD_BOUNDARY s u WORD_BOUNDARY t i WORD_BOUNDARY . WORD_BOUNDARY